14
SECTION 9: TROUBLE SHOOTING GUIDE
Trouble Possible Cause(s) Corrective Action
Engine fails to start 1. Blade control handle disengaged.
2. Start control button not depressed.
3. Spark plug wire disconnected.
4. Safety key not in run position.
5. Fuel tank empty, or stale fuel.
6. Blocked fuel line.
7. Faulty spark plug.
8. Engine flooded.
9. Self starter already de-energized.
1. Engage blade control handle.
2. Depress starter control button.
3. Connect wire to spark plug.
4. Place safety key in run position.
5. Fill tank with clean, fresh gasoline.
6. Clean fuel line.
7. Clean, adjust gap or replace.
8. Wait a few minutes to restart. Do not prime.
9. Use recoil starter to start engine
Engine runs erratic 1. Spark plug wire loose.
2. Blocked fuel line or stale fuel.
3. Vent in gas cap plugged.
4. Water or dirt in fuel system.
5. Dirty air cleaner.
6. Carburetor out of adjustment.
1. Connect and tighten spark plug wire.
2. Clean fuel line; fill tank with fresh gasoline.
3. Clear vent.
4. Drain fuel tank. Refill with fresh fuel.
5. Clean air cleaner.
6. Adjust carburetor.
Engine overheats 1. Engine oil level low.
2. Air flow restricted.
3. Carburetor not adjusted properly.
1. Fill crankcase with proper oil.
2. Remove blower housing and clean.
3. Adjust carburetor.
Occasional skip
(hesitates) at high
speed
1. Spark plug gap too close. 1. Adjust gap to .030”.
Idles poorly 1. Spark plug fouled, faulty or gap too
wide.
2. Carburetor improperly adjusted.
3. Dirty air cleaner.
1. Reset gap to.030” or replace spark plug.
2. Adjust carburetor.
3. Clean air cleaner.
Excessive vibration 1. Cutting blade loose or unbalanced.
2. Bent cutting blade.
1. Tighten blade and adapter. Balance blade.
2. Replace blade.
Mower will not mulch
grass
1. Wet grass.
2. Excessively high grass.
3. Dull blade.
1. Wait until later to cut.
2. Mow once at a high cutting height, then mow
again at desired height or make a narrower
cutting swath (1/2 width).
3. Sharpen or replace blade.
Uneven cut 1. Wheels not positioned correctly.
2. Dull blade.
1. Place all four wheels in same height position.
2. Sharpen or replace blade.